{"id":"eab0bb0d-8d93-476a-abbd-3a2ad6ba2711","shortId":"wxZWFr","kind":"x402","title":"Pay-per-request premium API access via x402 on Base network using USDC.","tagline":"Pay-per-request premium API access via x402 on Base network using USDC.","description":"This endpoint at lowpaymentfee.com provides \"Premium API Access\" via the x402 payment protocol. The specific endpoint `/api/v1/cards/70` is one of many API endpoints offered by the platform, which spans categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities.\n\nThe platform operates on a simple pay-per-request model at $0.02 per call, settled in USDC on the Base network. No API keys, rate limits, or commitments are required — callers simply attach an x402 payment header to each request. The x402 challenge confirms the endpoint is live and accepts payments to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a maximum amount of 20,000 base units (i.e., $0.02 USDC given 6 decimals).\n\nHowever, the specific functionality of `/api/v1/cards/70` is not documented beyond the generic label \"Premium API Access.\" The platform's docs, pricing, and README pages all render only a \"Connect wallet\" prompt with no further technical documentation. Without additional schema information or response examples, the exact data returned by this endpoint remains unclear.","tags":[],"capabilities":["x402-payment","usdc-settlement","base-network","pay-per-request","no-api-key","http-post"],"categories":["api-marketplace","crypto"],"synonyms":["x402 API","pay-per-call API","USDC API","Base network API","micropayment API","lowpaymentfee","cards endpoint"],"warnings":["No documentation available — docs, pricing, and README pages only show 'Connect wallet'","The specific functionality of /api/v1/cards/70 is undocumented; 'Premium API Access' is a generic label","No input or output schema provided beyond HTTP POST method"],"endpointUrl":"https://lowpaymentfee.com/api/v1/cards/70","protocol":"x402","transport":"http","auth":{"type":"x402","details":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://lowpaymentfee.com/api/v1/cards/70","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}]},"qualityScore":"0.300","qualityRationale":"The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation of what /api/v1/cards/70 actually returns, no input/output schema, and the docs pages are empty. The specific purpose of this endpoint is unknown.","verified":false,"liveness":"unknown","lastLivenessCheck":null,"agentReviews":{"count":0,"score_avg":null,"cost_usd_avg":null,"success_rate":null,"latency_p50_ms":null,"narrative_summary":null,"summary_updated_at":null},"enrichmentModel":"anthropic/claude-opus-4.6","enrichmentVersion":2,"enrichedAt":"2026-04-19T03:01:53.348Z","embedding":[-0.0103302,-0.058441162,0.038879395,0.030456543,0.025360107,-0.04135132,-0.052001953,0.058380127,0.07574463,-0.050994873,0.02722168,-0.06402588,-0.05758667,-0.03643799,-0.021942139,0.0052871704,-0.0033073425,0.018173218,-0.013366699,0.038848877,0.039001465,0.004600525,-0.016937256,0.02571106,0.014587402,0.002544403,-0.016113281,-0.0071525574,0.015052795,-0.050201416,0.027450562,-0.019348145,-0.0079574585,0.010040283,-0.027923584,-0.020599365,-0.004623413,0.05834961,0.03778076,-0.015716553,0.006511688,-0.07043457,-0.0010843277,0.01878357,-0.045715332,0.013801575,0.009597778,-0.037322998,0.00025200844,0.013313293,-0.035186768,0.0069618225,-0.009674072,0.012550354,0.0037765503,0.007160187,-0.0016994476,-0.028503418,0.0096206665,0.02607727,0.0040664673,-0.06506348,-0.012077332,-0.0038433075,-0.0066833496,0.043029785,-0.034088135,0.032989502,0.021850586,0.07891846,0.03668213,0.052612305,0.032073975,0.01889038,0.005619049,-0.010948181,-0.017089844,0.052703857,-0.013725281,-0.020767212,-0.017807007,-0.0035820007,-0.037475586,-0.0077667236,-0.020385742,-0.052947998,-0.009788513,0.0052871704,-0.010498047,0.005680084,-0.076171875,-0.007019043,-0.026473999,-0.006549835,-0.008117676,-0.0070343018,-0.032409668,0.011650085,-0.0057258606,0.024017334,0.016708374,-0.028182983,0.020309448,0.015220642,0.043060303,0.037994385,0.018539429,0.046905518,-0.0062446594,-0.026107788,-0.028762817,-0.0018186569,-0.032592773,-0.012817383,0.024169922,0.028182983,-0.016342163,0.009544373,-0.0149383545,0.025115967,-0.054595947,0.04144287,0.033233643,-0.031555176,0.01386261,-0.02444458,-0.012062073,0.01927185,-0.01071167,-0.003900528,0.025741577,0.0019102097,0.0395813,-0.018966675,-0.028884888,0.009849548,-0.015205383,-0.012069702,-0.042877197,-0.048339844,0.030685425,-0.016281128,0.03555298,0.027389526,-0.09667969,-0.008293152,-0.045135498,0.013427734,-0.053710938,0.007019043,-0.014801025,0.021881104,-0.010559082,-0.004989624,-0.014144897,-0.035827637,0.0066947937,0.035583496,-0.021759033,0.06719971,0.0015621185,0.022064209,-0.0064735413,-0.008346558,0.014930725,0.020874023,-0.006137848,-0.057922363,-0.074157715,-0.02494812,-0.019210815,-0.0206604,-0.045288086,0.011398315,-0.012901306,-0.061065674,-0.02293396,-0.017425537,-0.010948181,-0.03677368,-0.014816284,-0.02468872,0.013015747,0.004310608,-0.05822754,-0.018981934,-0.048950195,0.057006836,0.031707764,0.015281677,0.03515625,-0.009963989,0.06149292,0.0141067505,-0.018447876,-0.037078857,0.006290436,-0.024505615,0.0059890747,-0.0021514893,-0.0041503906,-0.032165527,0.023605347,0.08306885,0.013519287,-0.0095825195,-0.0068359375,-0.034088135,-0.017669678,-0.016036987,0.0037250519,0.013252258,0.0027561188,0.041015625,-0.033081055,-0.04724121,0.0009794235,0.022567749,0.0236969,0.052764893,0.00031232834,-0.011428833,0.023025513,0.027297974,-0.044708252,0.033172607,0.026397705,0.021896362,-0.043640137,-0.043640137,0.022125244,0.070007324,-0.010612488,-0.003288269,-0.024917603,0.029373169,-0.0029697418,0.013954163,0.019058228,-0.016830444,-0.03387451,-0.046173096,-0.020324707,0.01979065,-0.000039935112,-0.026428223,-0.035369873,-0.063964844,0.05581665,0.031951904,0.057159424,-0.022354126,0.00957489,-0.021896362,-0.009986877,-0.04574585,0.0385437,0.08459473,-0.0256958,-0.007850647,0.01473999,0.0006585121,-0.03289795,-0.011909485,-0.018127441,-0.018920898,-0.036621094,0.008125305,-0.041900635,0.020095825,0.021987915,0.037994385,0.0385437,-0.00033593178,-0.03262329,-0.026229858,-0.00894928,-0.0009946823,-0.02746582,-0.012825012,0.013557434,0.0011148453,0.031311035,0.0012598038,0.02079773,-0.020645142,0.010688782,0.0038204193,0.0121154785,-0.016189575,-0.0345459,0.022735596,-0.020965576,-0.068481445,0.006511688,-0.01586914,0.07104492,-0.032562256,0.04626465,-0.016342163,0.010192871,0.04171753,-0.039611816,-0.04119873,0.010803223,0.02444458,0.041992188,0.03314209,-0.0021820068,-0.02130127,-0.018005371,0.05230713,-0.005542755,0.0017547607,0.006565094,0.0236969,0.015716553,-0.017044067,-0.033172607,-0.051879883,-0.022476196,-0.012878418,0.018661499,-0.031463623,0.0440979,-0.005569458,-0.011291504,-0.030975342,-0.012809753,-0.029800415,0.04119873,-0.015625,0.008918762,-0.01436615,-0.01776123,0.02079773,0.016860962,-0.017578125,-0.014129639,0.021453857,0.046722412,-0.015701294,-0.04345703,-0.015670776,-0.023803711,0.0076789856,0.028533936,0.0075263977,0.03668213,0.023101807,-0.05368042,0.026229858,0.028182983,-0.0038261414,0.024032593,-0.0048942566,0.009407043,-0.058288574,-0.049957275,-0.025650024,-0.030761719,0.033966064,0.0034179688,0.002286911,0.05883789,0.023025513,-0.019439697,-0.028793335,0.02810669,-0.05960083,-0.003993988,0.035980225,-0.00021755695,-0.015686035,0.0146484375,-0.0026721954,0.00522995,0.04699707,-0.0024414062,0.01638794,0.06866455,0.040771484,0.013977051,0.025787354,0.023376465,0.028259277,0.008682251,-0.021499634,-0.020828247,-0.0059776306,0.02607727,-0.009094238,-0.025360107,-0.073913574,0.04083252,0.047851562,0.06390381,0.031204224,0.003780365,0.031311035,-0.02255249,0.024246216,-0.018829346,-0.011161804,-0.029647827,-0.02947998,0.01940918,-0.022583008,-0.012840271,-0.017608643,0.040039062,-0.015548706,0.008544922,-0.009353638,0.050567627,0.0010900497,-0.014053345,0.0065956116,0.0039253235,0.025405884,0.05279541,-0.053222656,0.029907227,0.018325806,-0.020187378,-0.001666069,0.03552246,-0.014404297,-0.03010559,-0.05545044,-0.02633667,-0.011871338,0.017822266,-0.053619385,0.035827637,0.017242432,0.024337769,0.009384155,-0.024307251,-0.0104522705,-0.008659363,-0.020843506,-0.05621338,-0.0087509155,-0.03201294,-0.008796692,0.05807495,-0.005558014,-0.002811432,0.012718201,-0.00248909,0.008995056,0.00340271,0.0132751465,0.010322571,-0.04348755,0.018295288,0.010124207,0.010498047,0.018966675,0.028411865,0.011474609,0.017730713,0.048187256,0.0076904297,-0.016189575,-0.03768921,0.023956299,-0.027420044,-0.020904541,0.0077819824,-0.0064926147,0.0129852295,-0.027679443,0.0042915344,-0.0463562,0.008842468,-0.012634277,0.02722168,0.0513916,-0.03817749,-0.034851074,-0.078125,-0.0104904175,0.026550293,0.08068848,0.028839111,-0.006416321,-0.05834961,-0.0034942627,0.0143585205,0.0143966675,0.018295288,-0.013633728,-0.025344849,-0.015342712,-0.005344391,-0.02003479,0.0018472672,0.024246216,0.0013284683,-0.003370285,0.019592285,0.014587402,0.029449463,0.012069702,0.010719299,0.039886475,-0.008552551,-0.000067055225,-0.015205383,0.04135132,0.003791809,-0.026611328,-0.053466797,0.050933838,-0.00040984154,0.030975342,-0.04272461,0.00074768066,-0.016860962,-0.00023162365,0.023025513,0.009796143,0.006088257,0.00062417984,-0.058135986,-0.07989502,0.030639648,-0.014282227,0.022949219,0.0026950836,0.007144928,0.032684326,0.010765076,-0.007785797,0.025421143,-0.032470703,-0.012336731,-0.031051636,-0.023422241,-0.025634766,-0.013328552,-0.02909851,0.010009766,-0.012542725,0.015205383,0.013633728,-0.020187378,0.024536133,0.002155304,0.0014696121,0.012649536,0.009109497,0.0143966675,0.035369873,0.0037879944,-0.039001465,0.0044441223,0.0062446594,0.004547119,-0.0037155151,0.03173828,0.021850586,-0.01802063,0.02532959,-0.0007619858,-0.025360107,-0.02810669,-0.009864807,0.009422302,0.029251099,-0.0029773712,-0.034210205,0.02658081,0.015686035,-0.02508545,-0.0077171326,0.015838623,0.024520874,-0.029403687,0.019515991,0.03567505,0.06365967,-0.0340271,0.005142212,-0.0019836426,0.02619934,0.020950317,0.0074005127,-0.017807007,0.03866577,-0.015007019,0.015548706,-0.011161804,-0.01247406,0.009170532,0.0029067993,0.03579712,0.025283813,0.013534546,-0.025100708,-0.014915466,-0.012413025,-0.009559631,-0.02470398,0.020431519,0.034423828,0.028503418,-0.020645142,0.032470703,0.014976501,-0.019882202,-0.010299683,-0.009010315,0.05429077,-0.027679443,-0.015655518,0.012794495,0.008850098,0.0335083,-0.062683105,0.00081825256,-0.0026054382,0.00067281723,-0.015808105,-0.044799805,-0.030593872,0.012565613,0.025161743,0.017303467,0.010238647,0.018600464,0.0074310303,0.014076233,0.036224365,0.0018501282,-0.0058937073,0.0010156631,-0.060424805,-0.011672974,0.004562378,-0.000729084,-0.002653122,-0.0005927086,-0.0032444,-0.03024292,0.0001129508,-0.010726929,0.0036201477,-0.017089844,-0.0010414124,0.03164673,-0.011108398,0.014129639,-0.022140503,-0.018463135,0.015144348,0.01121521,0.031799316,-0.030792236,0.024902344,-0.015655518,-0.016662598,0.0016822815,0.032989502,0.015701294,0.037506104,-0.0101623535,0.03778076,-0.044921875,0.028579712,-0.04748535,0.015411377,0.017791748,-0.03463745,-0.004878998,-0.029403687,-0.0074653625,0.040649414,-0.017120361,-0.0007548332,-0.03161621,-0.027755737,0.0013017654,-0.044647217,0.031921387,0.023925781,0.033721924,-0.036132812,0.009384155,-0.0015459061,0.0035953522,-0.012519836,-0.0035419464,-0.01600647,0.0058631897,0.019638062,0.0065956116,-0.030410767,-0.018157959,0.009017944,-0.0038642883,-0.039123535,-0.029067993,-0.01876831,0.009788513,-0.0035991669,-0.024002075,-0.030288696,-0.017837524,-0.003332138,-0.036102295,0.021240234,0.00011342764,0.027389526,0.009544373,-0.01285553,-0.0074310303,0.021820068,-0.010345459,0.048980713,-0.0017490387,-0.0061683655,-0.041107178,-0.007247925,0.016937256,0.016052246,0.005054474,-0.008399963,0.0054359436,-0.021591187,-0.057159424,-0.0010557175,-0.012054443,-0.0039405823,-0.0062675476,-0.018493652,-0.05090332,-0.011940002,-0.017929077,0.008468628,0.015823364,0.011886597,0.017974854,0.008506775,-0.0060768127,-0.026184082,-0.037353516,-0.031585693,0.020828247,0.009803772,0.023986816,0.006450653,0.04269409,0.010536194,-0.014305115,0.014167786,-0.008224487,0.019699097,-0.015106201,0.007331848,-0.0019817352,0.007572174,-0.008911133,-0.011444092,-0.025970459,0.004962921,0.07836914,-0.0049438477,-0.010147095,-0.0041275024,-0.0084991455,0.01449585,0.024230957,-0.04208374,-0.0023994446,-0.02003479,0.015167236,0.0017995834,0.0042800903,0.008666992,0.026931763,-0.024993896,-0.046539307,-0.014633179,0.006275177,-0.024841309,-0.05239868,-0.02520752,-0.06866455,-0.003446579,-0.00014221668,-0.016708374,0.0052223206,0.006000519,0.0041923523,-0.079711914,-0.0032253265,0.0519104,0.010818481,0.021591187,-0.013053894,0.018966675,0.020004272,-0.03265381,-0.029647827,0.02519226,-0.044006348,-0.0054397583,-0.035095215,0.0395813,-0.028717041,-0.024642944,0.019866943,0.005569458,0.011924744,-0.006160736,-0.010681152,0.0020141602,0.010566711,-0.014076233,0.03527832,-0.0014886856,-0.020217896,0.033935547,-0.038848877,0.03201294,0.0025691986,-0.035186768,-0.0034942627,0.02532959,0.04019165,-0.029632568,-0.020141602,0.030166626,0.0066947937,0.03656006,-0.026733398,0.045074463,0.0059432983,-0.010215759,0.009757996,-0.007904053,-0.022842407,-0.04660034,-0.010124207,0.028076172,-0.015808105,0.02746582,-0.007987976,0.010475159,-0.005054474,-0.0035533905,0.018234253,-0.018112183,-0.01713562,-0.0051727295,0.0047950745,0.008392334,-0.0038337708,0.0059318542,0.028884888,0.009262085,0.03552246,0.003030777,-0.0231781,0.03463745,0.017349243,-0.012413025,0.019424438,0.025131226,-0.0008559227,0.023330688,0.028808594,0.017242432,-0.047088623,-0.015281677,-0.024932861,-0.0070343018,-0.013076782,-0.007980347,-0.022613525,-0.0058898926,0.011230469,0.008392334,-0.043121338,0.0020332336,-0.025726318,-0.04171753,0.0024528503,-0.027572632,0.009773254,0.004272461,0.020202637,0.031341553,-0.010826111,0.040405273,0.005340576,0.003917694,0.032165527,0.02960205,0.013191223,-0.021575928,-0.007762909,-0.0008249283,0.0004451275,0.019119263,-0.02218628,0.009475708,0.02708435,-0.015586853,0.006111145,-0.00004684925,0.03189087,0.0010213852,0.013137817,-0.00491333,0.0022239685,-0.031311035,0.0385437,-0.049804688,0.006061554,0.01864624,0.017028809,0.0077819824,-0.0071907043,-0.024963379,0.021362305,0.010063171,-0.01751709,0.035186768,-0.0032749176,0.030975342,-0.0058288574,-0.024337769,-0.0011291504,-0.03366089,-0.008300781,0.032348633,-0.004211426,-0.000076532364,0.015975952,-0.022369385,0.060028076,-0.021514893,0.011100769,-0.0009765625,0.018859863,-0.0066375732,-0.015106201,-0.0110321045,-0.014167786,-0.006175995,-0.010726929,-0.0011091232,0.05508423,0.019805908,0.010375977,0.032226562,-0.0031394958,0.010215759,-0.0340271,-0.018844604,0.0027275085,-0.01739502,0.01940918,-0.014038086,0.062347412,0.041137695,0.001616478,0.043121338,0.019241333,0.02255249,0.011978149,0.0037384033,-0.01789856,0.009925842,-0.0054473877,0.02331543,0.0025501251,0.030563354,-0.017974854,0.020263672,0.0056915283,0.011940002,-0.05255127,0.030975342,0.05883789,0.014419556,0.0021362305,0.02960205,-0.014015198,-0.007221222,-0.015823364,-0.0066184998,0.071899414,0.009475708,0.05102539,0.04458618,0.019973755,-0.013519287,0.018692017,-0.026123047,-0.0231781,0.05291748,0.032806396,-0.025222778,-0.007259369,-0.004890442,0.007007599,-0.050354004,-0.026992798,0.008888245,-0.0015592575,0.008331299,0.00869751,-0.01386261,-0.017410278,0.026046753,0.016571045,0.007331848,-0.018295288,0.0385437,0.039794922,0.003440857,0.014419556,-0.013496399,0.025100708,-0.018112183,-0.010910034,0.015167236,0.022583008,-0.011276245,0.0010929108,0.019592285,-0.008911133,0.029296875,0.03643799,-0.015258789,0.023956299,0.041381836,0.00029540062,-0.014816284,0.030639648,0.028457642,0.0028648376,0.030532837,0.029571533,0.03668213,-0.037231445,0.014595032,-0.013130188,0.0073242188,-0.005180359,-0.013809204,0.010223389,-0.012275696,0.013465881,0.019821167,-0.031097412,0.025787354,0.029724121,0.01108551,-0.005279541,-0.010787964,0.013656616,-0.0152282715,0.0045928955,-0.004234314,-0.011009216,0.037628174,0.013839722,0.033569336,-0.021850586,0.033050537,0.0073165894,-0.0064888,-0.013092041,0.012886047,-0.040100098,0.0055656433,-0.008911133,0.010391235,-0.05569458,0.0074310303,0.020141602,-0.009262085,0.022201538,-0.0014591217,-0.0058898926,-0.0009226799,0.029449463,0.005821228,-0.012908936,-0.016464233,-0.035125732,0.056610107,0.03112793,-0.00024533272,0.010391235,-0.0067596436,-0.008804321,0.0077819824,-0.0025119781,0.014305115,-0.005088806,-0.0073127747,-0.040863037,0.019424438,0.032287598,0.026473999,0.04324341,-0.0036525726,-0.0038108826,-0.00605011,0.035247803,0.0059013367,-0.009635925,-0.021987915,0.014152527,-0.0030956268,0.045440674,0.056518555,0.0013799667,0.0025577545,-0.014724731,-0.023391724,0.0011863708,-0.015090942,0.0028495789,-0.013572693,0.0032634735,-0.013694763,0.02078247,-0.004283905,-0.042144775,0.0013217926,-0.0028896332,-0.009811401,-0.02658081,-0.0018806458,0.0009918213,0.019378662,0.034179688,0.0040893555,-0.035369873,0.062347412,-0.01737976,0.038879395,-0.00712204,-0.013809204,0.03277588,0.025421143,0.031921387,0.006652832,0.02734375,-0.019882202,0.012840271,0.05230713,0.005722046,0.012168884,0.0015640259,-0.02508545,0.03970337,0.008285522,0.03717041,-0.009552002,-0.015701294,0.012969971,0.0051956177,0.0126571655,0.0028591156,-0.0066719055,0.022445679,0.028762817,-0.03668213,-0.012039185,-0.018096924,-0.016677856,0.027191162,-0.003835678,-0.0008392334,-0.0024642944,-0.03137207,0.030899048,-0.03643799,-0.02243042,-0.008621216,0.03213501,-0.026992798,-0.019622803,-0.012359619,0.03125,-0.026046753,0.020111084,0.032196045,0.004085541,0.021957397,0.043029785,-0.00630188,0.03652954,0.010948181,0.0340271,0.034942627,-0.020843506,-0.022415161,0.0072669983,0.015655518,-0.021102905,-0.0022144318,0.035888672,-0.016418457,0.005004883,-0.0034179688,-0.0206604,-0.00057315826,0.01322937,-0.002357483,-0.0073623657,-0.0055885315,-0.0075416565,-0.0018787384,-0.0013780594,0.0071525574,-0.01373291,0.021102905,-0.009780884,0.0008401871,0.039123535,0.020645142,-0.045135498,0.0013465881,0.0024108887,0.013725281,-0.003955841,-0.01739502,-0.009689331,-0.031799316,0.00868988,-0.0014190674,0.005859375,0.013092041,-0.027542114,0.00023329258,0.015716553,0.018798828,0.016159058,0.003490448,-0.005634308,0.009780884,-0.0025424957,0.0057792664,-0.0093307495,-0.0072746277,0.014205933,0.021621704,-0.00868988,-0.033355713,0.030838013,-0.0033664703,0.008285522,0.009269714,-0.015571594,0.024230957,-0.007335663,-0.01574707,0.010681152,0.00831604,-0.0029335022,-0.03463745,-0.024765015,0.034942627,0.052947998,-0.012199402,-0.009292603,0.018737793,0.016174316,0.034118652,0.029342651,0.011810303,0.030181885,0.021377563,-0.0073509216,-0.008010864,0.023468018,-0.02041626,-0.022262573,0.011245728,-0.02178955,-0.037872314,0.03225708,0.011413574,-0.0010433197,-0.0060577393,-0.021362305,-0.007987976,-0.014266968,0.02017212,-0.014152527,0.0036678314,-0.028427124,-0.021377563,0.003982544,-0.0010929108,-0.037872314,-0.03274536,-0.0023040771,-0.014076233,-0.062194824,0.0154953,-0.032989502,0.009376526,-0.008460999,-0.007980347,0.0067977905,0.033813477,-0.020187378,0.0031776428,-0.005886078,0.033081055,0.016189575,0.024124146,0.007575989,-0.016937256,-0.040222168,-0.021972656,-0.016311646,0.0016374588,0.020477295,-0.0070152283,0.044158936,0.03277588,-0.014305115,-0.008964539,0.0014390945,-0.006549835,0.008483887,-0.03289795,-0.0056610107,0.013504028,0.01663208,-0.0058135986,0.0006341934,0.04135132,-0.03125,-0.025970459,0.045898438,0.05340576,0.0056419373,0.038238525,-0.012641907,-0.025115967,-0.006084442,-0.0060653687,-0.01537323,0.009674072,0.0017404556,-0.0012159348,-0.0004632473,0.006587982,0.017166138,-0.0069999695,-0.006034851,0.023040771,0.010986328,-0.016281128,0.029174805,0.017242432,-0.0095825195,-0.011520386,-0.018859863,0.044708252,0.035614014,0.010940552,-0.0004386902,0.0026187897,-0.005771637,-0.011993408,0.000119268894,0.03567505,-0.013305664,-0.043823242,-0.011703491,-0.01689148,0.021148682,-0.002248764,0.019012451,-0.0030593872,0.018630981,-0.023773193,-0.03086853,-0.011878967,0.023910522,0.01285553,-0.0030918121,-0.011955261,0.0119018555,0.026657104,-0.025619507,0.0064201355,-0.04360962,-0.014015198,-0.0049552917,-0.015640259,0.018203735,0.015899658,0.0021533966,-0.00995636,-0.006843567,0.00705719,0.0020217896,0.032073975,-0.028869629,0.0015802383,0.011131287,0.011009216,-0.016784668,0.015014648,0.0056610107,-0.001627922,0.0021800995,-0.011520386,0.01838684,-0.016784668,0.04043579,-0.0044670105,-0.013114929,0.040100098,-0.003604889,0.0055503845,-0.0034885406,0.015655518,0.011688232,0.0064582825,0.026916504,-0.027923584,-0.011383057,0.020324707,-0.015960693,-0.041656494,0.0044517517,0.03326416,0.03552246,-0.018356323,0.04324341,-0.00774765,-0.009941101,0.02192688,-0.0004916191,-0.02041626,-0.010139465,0.027145386,0.0022621155,-0.02041626,0.0057373047,-0.025878906,-0.036834717,-0.01373291,0.0070648193,-0.004673004,-0.0026664734,0.031433105,0.0143966675,0.033050537,0.003129959,0.02029419,0.030029297,0.006828308,0.022033691,0.0231781,0.06137085,0.0040283203,-0.034942627,0.010513306,-0.010475159,-0.017425537,0.0013723373,-0.00680542,0.0028305054,-0.035858154,0.012916565,0.013801575,0.029327393,-0.020767212,0.00793457,-0.018295288,-0.00907135,-0.017669678,-0.012802124,-0.011932373,0.011756897,0.042816162,0.013725281,0.011024475,-0.002904892,-0.009605408,0.02053833,0.05432129,-0.011230469,-0.022781372,-0.006565094,0.010055542,-0.001168251,0.0056419373,-0.0037631989,-0.031951904,-0.013954163,0.009979248,-0.008354187,0.010009766,0.002614975,0.016677856,-0.00058317184,-0.007381439,0.0021457672,0.029708862,-0.013938904,0.0023727417,0.019302368,0.0008211136,0.027038574,0.02520752,-0.02229309,0.035186768,0.023544312,-0.03744507,0.05432129,0.0060806274,0.016159058,-0.014282227,0.0033187866,-0.047729492,-0.011642456,-0.0072402954,-0.002439499],"createdAt":"2026-04-18T18:43:46.109Z","updatedAt":"2026-04-23T02:31:11.156Z","lastSeenAt":"2026-04-23T02:31:11.156Z","tsv":"'/api/v1/cards/70':45,145 '0.02':82,135 '000':131 '0x1a2b13e97f5f837c8f9fa1f95a1484b7c70d85f3':124 '20':130 '6':138 'Base network API' 'USDC API' 'accept':120 'access':7,21,36,155 'addit':177 'address':123 'ai':62 'amount':128 'analyt':61 'api':6,20,35,50,93,154 'attach':103 'base':11,25,90,132 'base-network' 'beyond':149 'call':84 'caller':101 'cards endpoint' 'categori':58 'challeng':113 'commit':98 'confirm':114 'connect':168 'data':60,185 'decim':139 'doc':159 'document':148,175 'endpoint':30,44,51,116,189 'exact':184 'exampl':182 'financ':65 'function':143 'generic':151 'given':137 'header':107 'howev':140 'http-post' 'i.e':134 'includ':59 'inform':179 'infrastructur':68 'key':94 'label':152 'learn':64 'limit':96 'live':118 'lowpaymentfee' 'lowpaymentfee.com':32 'machin':63 'mani':49 'maximum':127 'micropayment API' 'model':80 'network':12,26,91 'no-api-key' 'offer':52 'one':47 'oper':72 'page':163 'pay':2,16,77 'pay-per-call API' 'pay-per-request':1,15,76 'payment':40,106,121 'per':3,17,78,83 'platform':55,71,157 'premium':5,19,34,153 'price':160 'prompt':170 'protocol':41 'provid':33 'rate':95 'readm':162 'remain':190 'render':165 'request':4,18,79,110 'requir':100 'respons':181 'return':186 'schema':178 'settl':85 'simpl':75 'simpli':102 'span':57 'specif':43,142 'technic':174 'unclear':191 'unit':133 'usdc':14,28,87,136 'usdc-settlement' 'use':13,27 'util':69 'via':8,22,37 'wallet':169 'web3':66 'without':176 'x402':9,23,39,105,112 'x402 API' 'x402-payment'","prices":[{"id":"88237c7b-40f4-49b2-992a-ff3c5055bffa","listingId":"eab0bb0d-8d93-476a-abbd-3a2ad6ba2711","amountUsd":null,"unit":"per_call","nativeCurrency":"USD COIN","nativeAmount":"20000","chain":"base","payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","paymentMethod":"x402-usd coin","isPrimary":true,"details":{"scheme":"exact","mime_type":"application/json","accepts_all":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3","scheme":"exact","network":"base","mimeType":"application/json","resource":"https://lowpaymentfee.com/api/v1/cards/70","description":"Premium API Access","outputSchema":{"input":{"type":"http","method":"GET","discoverable":true}},"maxAmountRequired":"20000","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-18T18:43:46.109Z"}],"sources":[{"listingId":"eab0bb0d-8d93-476a-abbd-3a2ad6ba2711","source":"x402_bazaar","sourceId":"https://lowpaymentfee.com/api/v1/cards/70","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-18T18:43:46.109Z","lastSeenAt":"2026-04-23T02:31:11.156Z"}],"details":{"listingId":"eab0bb0d-8d93-476a-abbd-3a2ad6ba2711","quickStartSnippet":"curl -X POST https://lowpaymentfee.com/api/v1/cards/70 \\\n  -H \"Content-Type: application/json\" \\\n  -H \"X-PAYMENT: <x402_payment_token>\"","exampleRequest":null,"exampleResponse":null,"schema":{"input":{"type":"http","method":"GET","discoverable":true}},"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Platform charges $0.02 per request with no API keys, rate limits, or commitments","source_url":"https://lowpaymentfee.com"},{"claim":"Endpoint is live and returns a 402 x402 challenge with maxAmountRequired of 20000 base units in USDC on Base","source_url":"https://lowpaymentfee.com/api/v1/cards/70"},{"claim":"Payment asset is USDC at contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base network","source_url":"https://lowpaymentfee.com/api/v1/cards/70"}],"useCases":["Accessing premium data or services without API key registration","Making one-off paid API calls settled instantly in USDC on Base","Integrating pay-per-request endpoints into agent workflows"],"bestFor":["Developers wanting instant API access without signup","Agents that can settle x402 payments on Base","Users comfortable paying per request in USDC"],"notFor":["Users needing detailed documentation or response schemas before integrating","High-volume callers who prefer subscription-based pricing","Users without USDC on the Base network"],"kindDetails":{"x402_version":1,"resource_type":"http","bazaar_last_updated":"2026-02-17T23:14:26.367Z"},"updatedAt":"2026-04-23T02:31:11.156Z"}}